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- Max Planck Institute for AstrophysicsDE58 papers
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22 papers · 1 filter
Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A
S. A. Grebenev, A. A. Lutovinov, S. S. Tsygankov +1
It is assumed that the radioactive decay of Ti-44 powers the infrared, optical and UV emission of supernova remnants after the complete decay of Co-56 and Co-57 (the isotopes that…
Masses and Accretion Rates of Supermassive Black Holes in Active Galactic Nuclei from the INTEGRAL Survey
G. A. Khorunzhev, S. Yu. Sazonov, R. A. Burenin +1
The masses of 68 supermassive black holes (SMBHs) in nearby (z<0.15) active galactic nuclei (AGNs) detected by the INTEGRAL observatory in the hard X-ray energy band (17-60 keV) ou…
Probing the Blow-Off Criteria of Hydrogen-Rich "Super-Earths"
H. Lammer, N. V. Erkaev, P. Odert +3
The discovery of transiting "super-Earths" with inflated radii and known masses such as Kepler-11b-f, GJ 1214b and 55 Cnc e, indicates that these exoplanets did not lose their nebu…
Observation of standing kink waves in solar spicules
H. Ebadi, T. V. Zaqarashvili, I. Zhelyazkov
We analyze the time series of CaII H-line obtained from Hinode/SOT on the solar limb. The time-distance analysis shows that the axis of spicule undergos quasi-periodic transverse d…
Jets and gamma-ray emission from isolated accreting black holes
M. V. Barkov, D. V. Khangulyan, S. B. Popov
The large number of isolated black holes (IBHs) in the Galaxy, estimated to be 10^8, implies a very high density of 10^-4 pc^-3 and an average distance between IBHs of 10 pc. Our s…
Downward transport of electromagnetic radiation by electron holes?
R. A. Treumann, W. Baumjhohann, J. LaBelle +1
An attractive mechanism for radiation transport by electron holes from the magnetospheric auroral cavity source region down to the ionosphere and possibly even down to the atmosphe…